Questions tagged [motor]

An electrical actuator that converts electrical energy into rotational motion or sustained linear motion (linear motor). There are many types of electric motors. If the specific type of motor is known, it is helpful to use or add a more specific tag, such as dc-motor, brushless-dc motor or induction-motor.

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12 views

DC motor circuit design with changing voltage

I am designing a circuit where there are two power sources in series and supplying the power to a dc motor. However, the 9 V source will decrease its voltage linearly over time, but the motor needs to ...
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74HC595 overheating

I am trying to drive some small water pumps with a 74HC595, I added transistors to the output of the 595 in a common emmiter configuration, I used BD135 transistors and 700 ohm resistors for the base ...
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Engine driven EDF

We all know that an electric motor can be reversed to generate electricity. My question is, will it work the same way if I were to do this in an EDF? The EDF that I’ve been watching, is producing 35 ...
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Controlling stepper motor speed & direction with single L298N H-Bridge

I'm in planing phase of my project. I have this motor: US-17HS4401 Stepper Motor (bipolar i think, has 4 wires). Can I use a single L298N H-Bridge motor to drive it. As in control both speed, ...
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Motor Sizing and Wiring Diagram Help? My motor has a wiring diagram but no ID tag

Here is a link to an Imgur album of my motor and its wiring diagram I have a motor that I'd like to wire. My two questions are, how do I determine its operating parameters, and how do I use its ...
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37 views

Is Integral gain much use with a frequently changing setpoint?

I have a motor/encoder setup with a PI loop, where the motor needs to travel to a certain position following an accel/decel profile. The setpoint in this case is position at time T, which changes each ...
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52 views

Why treadmill motor speed controllers are not interchangeable?

Why treadmill motor speed controllers are not interchangeable? I just wonder why, if two different treadmills have different upper control consoles and different controllers why we can not switch ...
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63 views

20kg digital servo not working, probably because my frequency calculations are very wrong (raspberry pi)

summary I changed my servos for a more powerful one and cannot get it to work, I believe it is because I can't get the right duty cycle calculation in the code explanation I have a robotic arm that ...
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What will happen if I power up a motor with its rated voltage and limit the supplied current? [closed]

Let say a motor is rated for 100mA at 3.7V with no load, which means it will draw 100mA ...
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1answer
38 views

Current Feedback from PWM controlled Motor

I am looking at two different ways of controlling motor speed and torque of a simple small DC motor. The circuit on the right is the analogue circuit with the current provided by the power bjt. Here, ...
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12 V DC Li battery voltage regulation question

I recently bought a 12 V 50 Ah Li battery with the intent to use it for a 12 V DC trolling motor for a boat. The trolling motor runs at up to 30 A. I have read that lithium batteries tend to output ...
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electric motor diagnostic and troubleshooting

I put my hands on vintage Dewalt radial arm saw. from the radial arm saw community its probably manufactured on the 40's. The motor is single phase and connected to 220V (this is the default line in ...
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37 views

Does powering both phases (left/right rotation) of an AC motor hurt it?

I know that one can reverse the direction of an ac motor by powering the different starter windings. If you power one starter winding, you create a magnetic bias, allowing the motor to rotate to that ...
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Generator sizing for water pump

I'm trying to size a backup generator for a water pump system. The pump is rated 3HP / 230V / 13.5 A So it seems that I would need a ~ 3KW generator on a steady state. However, I'm aware of the ...
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68 views

What is the best way to turn the knob on a lamp automatically?

I've been bored during quarantine and decided to build my very first circuit that wasn't school-related. I want to make my lamp remote-control, and my initial thought is that the best way to do this ...
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The effects on torque/slip when changing speed?

I know that the number of poles altering frequency and voltage changes the speed but I don't know how either alters the torque or slip.
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Why did my motor drivers burst into flames when I disconnected them?

I have set up an old mobility scooter to be remote controlled with some cobbled together boards from the usual sources. Everything was working well for weeks until one day when I was trying to bind a ...
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How an animation is done with LEDs?

while(true) {   movePlayer('upright', '10 * Time.deltaTime'); } Here, an animation is done. No button or mouse click is done. Everything moves automatically. How ...
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Why do some motors have high rpm while other have low even though having same power consumption

I have seen a 500w motor which run on 1200 rpm but a 300w motor with over 10000rpm . I know using a gearbox can give required rpm or torque and torque is inversely proportion to speed but how can I ...
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44 views

Why do inverter of a EV motor need capacitor?

Why do inverter of a motor need capacitor? More specifically, a Tesla model 3 induction motor case. But in fact, almost all electrical vehicle's motor has film capacitor. Film capacitor is an ...
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Motor start questions

What does starting the motor with a locked rotor simulate, beyond a locked rotor start? There is an outage to a plant with a large number of big three-phase motors. What happens when power is restored,...
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2answers
68 views

Make motor run slower

I was wondering if anyone could help me or give advice. I have an old electric green goods shredder. I want to use the motor to make a wood turning machine. How do I add a simple speed control to the ...
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Wiring electric motor

I am repairing a 1.5 hp electric motor from a floor buffer. I goofed and did not take pictures before removing the old wire. Might be hard to see but there are 2 black wires going to capacitor?, a ...
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71 views

How to wire an old single phase AC brushed motor to be reversable

I have searched several forums and found a lot of interesting stuff, but nothing yet that really applies to my situation. I have an old Westinghouse FH motor 1 1/2HP single phase brushed AC motor. ...
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with a L298N controller I need to “warm up” the motor to get it to run without stopping, why and how to do it with python

I understand that this will be a very trivial question but I cannot find an explanation online, probably because in my ignorance I'm asking the wrong question, to support my explanation I'm leaving ...
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What motor is this (movie)?

What type of electrical motors are on the movie? On the Youtube video they use commercial off-the-shelf consumer fans. There is a control system - which is basically 4x OptoCoupler + Triac + (...
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Variable field magnet motor?

See the video in the following link: https://www.youtube.com/watch?v=olnXy-J48SY "Variable field magnet motor" How does this work and is it actually efficient?
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79 views

Shaded-Pole motor, how does it work?

I need some explanation about Shaded-Pole Motor. In the book: "Electric Motors and Control Systems" by Frank D. Petruzella (published by McGraw-Hill), in Chapter 5, Part 4, on page 113 under "Shaded-...
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954 views

How many times of a frequency of a PWM can properly generate a sine wave to drive a motor?

I know PWM with dense and loose duty cycle is used to generate sine wave for applications such as 3-phase motor driving. But, How fast does it require to properly generate a sine wave to drive a motor?...
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56 views

High level vs low level motor control - acceleration and velocity profiles

I was wondering how are motor control loops normally run? Lets say we have an autonomous car and a Model Predictive Controller defines a velocity and acceleration profile to get to the correct ...
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88 views

What kind of electric motor is this?

I found a movie about controlling motor speed. It is a motor from a Vitamix Blender, controlled with a potentiometer. What kind of motor they are using for these blenders?
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Maximum temperature of an electric motor and proper cooling system

I have found an electric motor in my home and I want to estimate how much time it can operate until its temperature becomes too high and eventually build a cooling system for it (I have seen that ...
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1answer
45 views

Using a 3-phase Transformer After a Variable Frequency Drive for Voltage Reduction

In the plating industry generally 42V - 3P motors are used to rotate the barrels that hold the products to be plated. This is because the contacts of the barrel cannot be isolated (because barrels are ...
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Motors on autonomous driven vehicle free spin in opposite direction they are turning while powered

I work as a project manager for an Automated Guided Vehicle manufacturer located in Germany. I have a small team of technicians that assist me in installations and maintenance support in the US. ...
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63 views

How to control motors with an arduino

I am a complete beginner with electronics mostly dabbling as a hobby so please forgive me if I struggle to follow or don't understand specific terms. I have been working on a project for a while now ...
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109 views

Power BJT Transistor in motor driver keeps burning

The power transistor 2N3055 keep getting damaged after connected for a couple seconds to this circuit. I would like to know what could be the cause. I soldered this circuit for a 6-wire stepper motor ...
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194 views

Why do Tesla and other manufacturers use AC motors? [duplicate]

I know Tesla and others use AC motors. I read a lot and no one really provides a good answer. I know they are using an AC induction motor, and with Model 3 also an AC synchronous permanent magnet ...
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46 views

How to reverse a 240 single phase 7.5 hp motor

Trying to use a WEG 240 Volt electric motor from a IR compressor to power a different compressor pump. The electric motor is wired for CW rotation and I need CCW. The motor has 2 Start Capacitors in ...
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Upgrade BLDC motor controller (ESC) to higher wattage (replace mosfets/shunt)

I was wondering if I could upgrade my current bldc motor controller (three phase motor)(*) to a higher wattage/output power by doing the following modifications: Replace mosfets with higher power ...
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9answers
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arduino power problem when using boost converter

I am making a bot capable of solving a maze. I will explain the setup first. There is a 18650 3.7V battery, using a XL6009 DC-DC boost switching regulator, like this one: Picture Source I boost the ...
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60 views

Low/Mid/High 230V Fan Control with RaspberryPI

I have fan 230 VAC 300 W, Relay SRD-05VDC-SL-C, and RaspberryPi, what other equipment i would need to be able to control Fan 230VAC with RaspberryPi? I want to go 0/1 with relay, and in mode:1, be ...
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Confusion with peak and RMS values when calculating the torque of an electric motor

For electric 3-phase motors with a efficiency of 100% (assumed here for simplicity) the following equation holds: $$P = \omega T = 3 U I$$ where \$U\$ and \$I\$ are the phase RMS values of the ...
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Permanent Magnet DC Motor speed and current controls

I have designed a Permanent magnet DC motor in Simulink MATLAB. Its block diagram is the following. I want to know how to control the current and voltage using PI and other transfer functions ...
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62 views

How do I connect this electric motor

I got this old electric motor from a friend of mine, and I don't really know the right way to connect it to electricity supply. It's a IMEX (type = YC112M-4) motor. I've tried to look for the wiring ...
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26 views

How to determine the right spec of a servo motor given an inertia moment?

I'm working on a trash bin which lid is controlled (opened/closed) by a microcontroller and thus i decided to use a servo motor. The lid is 47 x 47 x 0.1 cm and because its made from steel has a ...
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Battery management for 12-24V motors

We have 4 12-24V motors which we want to connect to a 14,8V battery. Two of the motors are position controlled (M3 and M4, see figure) and will not draw much current as they will mainly be stationary. ...
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45 views

How can I drive this 4 coil motor? [closed]

I have a motor that I pulled off a broken Dyson v8 hoover. When I removed the broken driver circuit(the capacitors snapped off) I found this motor layout with 4 coils and no wiring pattern. How can I ...
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How to select a DC motor parameters

I would like to know how to calculate or select DC motor parameters when knows some parameters. Knowing parameters: Speed range: -2000 to 2000 rpm Torque range: -65 to 80 Nm Expected friction torque:...
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Motor Constants Understanding

I have a basic question regarding the constants of a motor. I want to know the name of the constants and their SI unit. Torque (T) = Kt x Flux x Ia Back EMF (E) = Ke x Flux x speed When flux is ...
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27 views

Sabertooth 2x12 Independent Analog Mode

I am using an arduino Mega to control 4 DC motors with 2 Sabertooth 2x12 motor controllers. I am using the Sabertooth controllers in independent analog mode (1,2,3,5,6 UP.. 4 down). I have a simple ...

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